Hi, Thanks for the reply.
Linux version:linux-2.6.18 Xenomai: xenomai-2.3.0 (Stable version) adeos patch: adeos-ipipe-2.6.18-ppc-1.5-01.patch The tests were run as follows: 1)The sampling period in the code for latency and switchbench was changed to 1000000000ns(to remove overrun error) 2)switchtest was run with -n5 option 3)cyclictest was run with -t5 option(5 threads were created.) 4)cyclictest was terminated with Illegal instruction (after creating 5 threads) with IPIPE tracer enabled. These were the results without I-PIPE Tracer option: (All the tests were run without any load) 1)LATENCY TEST:- User mode:- /mnt/out_xen/bin# ./latency -t0 == Sampling period: 1000000 us == Test mode: periodic user-mode task == All results in microseconds warming up... RTT| 00:00:01 (periodic user-mode task, 1000000 us period, priority 99) RTH|-----lat min|-----lat avg|-----lat max|-overrun|----lat best|---lat worst RTD| 167.000| 167.000| 167.000| 0| 167.000| 167.000 RTD| 176.000| 176.000| 176.000| 0| 167.000| 176.000 RTD| 168.000| 168.000| 168.000| 0| 167.000| 176.000 RTD| 171.000| 171.000| 171.000| 0| 167.000| 176.000 Kernel mode:- [EMAIL PROTECTED]:/mnt/out_xen/bin# ./latency -t1 == Sampling period: 1000000 us == Test mode: in-kernel periodic task == All results in microseconds warming up... RTT| 00:00:00 (in-kernel periodic task, 1000000 us period, priority 99) RTH|-----lat min|-----lat avg|-----lat max|-overrun|----lat best|---lat worst RTD| 123.000| 123.000| 123.000| 0| 123.000| 123.000 RTD| 125.000| 125.000| 125.000| 0| 123.000| 125.000 RTD| 128.333| 128.333| 128.333| 0| 123.000| 128.333 RTD| 127.000| 127.000| 127.000| 0| 123.000| 128.333 Interrupt mode:- [EMAIL PROTECTED]:/mnt/out_xen/bin# ./latency -t2 == Sampling period: 1000000 us == Test mode: in-kernel timer handler == All results in microseconds warming up... RTT| 00:00:01 (in-kernel timer handler, 1000000 us period, priority 99) RTH|-----lat min|-----lat avg|-----lat max|-overrun|----lat best|---lat worst RTD| 45.334| 45.334| 45.334| 0| 45.334| 45.334 RTD| 45.000| 45.000| 45.000| 0| 45.000| 45.334 RTD| 46.000| 46.000| 46.000| 0| 45.000| 46.000 RTD| 47.334| 47.334| 47.334| 0| 45.000| 47.334 RTD| 46.334| 46.334| 46.334| 0| 45.000| 47.334 2)CYCLICTEST RESULTS:- [EMAIL PROTECTED]:/mnt/out_xen/bin# ./cyclictest -t5 5.14 3.71 1.72 6/31 216 T: 0 ( 0) P:99 I: 1000 C: 0 Min: 1000000 Act: 0 Avg: 0 Max:-1000000 T: 1 ( 0) P:98 I: 1500 C: 0 Min: 1000000 Act: 0 Avg: 0 Max:-1000000 T: 2 ( 212) P:97 I: 2000 C: 8112 Min: 169 Act: 189 Avg: 204 Max: 288 T: 3 ( 0) P:96 I: 2500 C: 0 Min: 1000000 Act: 0 Avg: 0 Max:-1000000 T: 4 ( 216) P:95 I: 3000 C: 21596 Min: 180 Act: 1279 Avg: 702 Max: 1336 3)SWITCHBENCH TEST RESULTS:- [EMAIL PROTECTED]:/mnt/out_xen/bin# ./switchbench -n5 == Sampling period: 1000000 us == Do not interrupt this program RTH| lat min| lat avg| lat max| lost RTD| 229.333| 45.666| 229.333| 0 Test results with IPIPE tracer enabled 1)LATENCY TEST RESULTS:- User mode:- [EMAIL PROTECTED]:/mnt/out_xen/bin# ./latency -t0 == Sampling period: 1000000 us == Test mode: periodic user-mode task == All results in microseconds warming up... RTT| 00:00:01 (periodic user-mode task, 1000000 us period, priority 99) RTH|-----lat min|-----lat avg|-----lat max|-overrun|----lat best|---lat worst RTD| 340.000| 340.000| 340.000| 0| 340.000| 340.000 RTD| 338.666| 338.666| 338.666| 0| 338.666| 340.000 RTD| 341.000| 341.000| 341.000| 0| 338.666| 341.000 RTD| 342.000| 342.000| 342.000| 0| 338.666| 342.000 2)kernel mode:- [EMAIL PROTECTED]:/mnt/out_xen/bin# ./latency -t1 == Sampling period: 1000000 us == Test mode: in-kernel periodic task == All results in microseconds warming up... RTT| 00:00:00 (in-kernel periodic task, 1000000 us period, priority 99) RTH|-----lat min|-----lat avg|-----lat max|-overrun|----lat best|---lat worst RTD| 303.333| 303.333| 303.333| 0| 303.333| 303.333 RTD| 309.666| 309.666| 309.666| 0| 303.333| 309.666 RTD| 325.000| 325.000| 325.000| 0| 303.333| 325.000 RTD| 306.333| 306.333| 306.333| 0| 303.333| 325.000 Interrupt mode:- [EMAIL PROTECTED]:/mnt/out_xen/bin# ./latency -t2 == Sampling period: 1000000 us == Test mode: in-kernel timer handler == All results in microseconds warming up... RTT| 00:00:01 (in-kernel timer handler, 1000000 us period, priority 99) RTH|-----lat min|-----lat avg|-----lat max|-overrun|----lat best|---lat worst RTD| 153.334| 153.334| 153.334| 0| 153.334| 153.334 RTD| 154.667| 154.667| 154.667| 0| 153.334| 154.667 RTD| 164.334| 164.334| 164.334| 0| 153.334| 164.334 RTD| 154.667| 154.667| 154.667| 0| 153.334| 164.334 RTD| 163.667| 163.667| 163.667| 0| 153.334| 164.334 2)CYCLICTEST RESULTS:- [EMAIL PROTECTED]:/mnt/out_xen/bin# ./cyclictest -t5 0.18 0.15 0.09 3/26 194 T: 0 ( 0) P:99 I: 1000 C: 0 Min: 1000000 Act: 0 Avg: 0 Max:-1000000 T: 1 ( 0) P:98 I: 1500 C: 0 Min: 1000000 Act: 0 Avg: 0 Max:-1000000 T: 2 ( 190) P:97 I: 2000 C: 0 Min: 1000000 Act: 0 Avg: 0 Max:-1000000 T: 3 ( 0) P:96 I: 2500 C: 0 Min: 1000000 Act: 0 Avg: 0 Max:-1000000 T: 4 ( 193) P:95 I: 3000 C: 0 Min: 1000000 Act: 0 Avg: 0 Max:-1000000 Illegal instruction 3)SWITCHBENCHTEST RESULTS:- [EMAIL PROTECTED]:/mnt/out_xen/bin# ./switchbench -n5 == Sampling period: 1000000 us == Do not interrupt this program RTH| lat min| lat avg| lat max| lost RTD| 667.333| 133.333| 667.333| 0 SWITCHTEST:- Since FPU is not enabled for ppc, I was not able to get proper results for switchtest. Please mail the results of switchtest. Thanks, Poornima --- Wolfgang Grandegger <[EMAIL PROTECTED]> wrote: > poornima r wrote: > > Hi, > > > > I was able to run latency and switchbench tests on > > MPC860 board with IPIPE tracer feature > > enabled/disabled. > > Nice, what versions of Linux and Xenomai did you use > for your tests? It > is known that Linux 2.6 does not yet work properly > for 8xx. It would > also be nice if you could briefly post your results > on this list as well. > > > Interrupt & scheduling Latencies and switching > > latencies (with IPIPE tracer option disabled) were > > having lower values when compared to latency > values > > with IPIPE tracer enabled. > > The ipipe tracer introduces some overhead (extra > code) and as this CPU > is very slow, you will notice it. > > > cyclictest test results were same with or without > > IPIPE tracer enabled. > > Your results would really be of interest. > > > Is this reduced context switching latency in > > switchbench test due to timer interrupt? > > Likely it also due to overhead introduced by the > ipipe tracer. > > BTW: the switchtest should run as well with the > option "-n" (for not > using the FPU), > > Wolfgang. > > ____________________________________________________________________________________ 8:00? 8:25? 8:40? Find a flick in no time with the Yahoo! 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